Multiple length-scale microstructural characterisation of four grades of fine-grained graphite

Porous graphene with high porosity derived from nitrogen-doped graphene aerogel for vapor adsorption and lithium–sulfur batteries

“…This reduction can be attributed to the elimination of functional groups during the activation process [ 23 ]. Turning to Raman spectroscopy, a technique often employed to analyze carbon-based materials [ 24 ], we observe distinct changes in the D band (~ 1350 cm -1 ) and G band (~ 1590 cm -1 ). As shown in Fig.…”

Irradiation Characteristics of Non-impregnated Micropore Graphite for Use in Molten Salt Nuclear Reactors

“…At the same time, the pores of graphite showed the phenomenon of squeezing and contracting after irradiation with the low dose of irradiation, and the average size and density of pores on the surface of graphite are reduced, which is due to the fact that the pores and microcracks of graphite have an absorptive effect on the swelling of the graphite microcrystals, but this absorptive effect has a limitation, for example, under 0.11 dpa irradiation (Figure 3f), the pores of the graphite surface will tend to be closed when the absorptive effect of the graphite surface swelling reaches the saturation level. Previous studies have shown that the dimensional change of graphite is faster at irradiation temperatures below 250 °C, whereas in this paper the irradiation is carried out at room temperature, thus the amorphization of graphite will be rapidly induced [25]. Heggie et al pointed out that permanent basal plane nano-buckling may also lead to the expansion of the c-axis of graphite crystals at irradiation temperatures below 250 °C [26].…”